feat: ios in-app purchase methods (#1652)

* Add in-app purchase methods

* fix: init StoreKit controller on startup

* fix: Add transaction details to StoreKit callbacks

* nullpointer access fixed

* feat: in app purchase for ios

* feat: add IAP product fetching and logging for iOS platform

* feat: iOS Simulator building pipeline made

* feat: add support for multiple IAP product IDs and attempt purchase of the first valid one

* feat: add support for retrieving Base64-encoded app receipt after successful IAP purchase

* refactor: inapp-purchase code cleanup

* feat: iap processing

* refactor: move to storekit 2

* feat: add request to billing

* chore: add ios ifdef

* feat: remove iOS simulator specific code and exclusions

* refactor: remove unused StoreKit 2 transaction observer and simplify IAP product fetching logic

* feat: implement StoreKit 2 for iOS and macOS, add restore purchases functionality

* fix: Restore Purchases button appearance updated

* feat: enhance error handling and duplicate config detection in ApiConfigsController

* feat: add support for Mac OS NE in-app purchases and StoreKitController

* ci-cd fix

* Revert "ci-cd fix"

This reverts commit f22fd7a13b.

---------

Co-authored-by: vladimir.kuznetsov <nethiuswork@gmail.com>
Co-authored-by: vkamn <vk@amnezia.org>
Co-authored-by: spectrum <yyy@amnezia.org>

client/translations/amneziavpn_fa_IR.ts

@@ -2973,6 +2973,11 @@ It&apos;s okay as long as it&apos;s from someone you trust.</source>
         <source>Site Amnezia</source>
         <translation type="unfinished"></translation>
     </message>
+    <message>
+        <location filename="../ui/qml/Pages2/PageSetupWizardConfigSource.qml" line="229"/>
+        <source>Restore purchases</source>
+        <translation>بازیابی خریدها</translation>
+    </message>
     <message>
         <location filename="../ui/qml/Pages2/PageSetupWizardConfigSource.qml" line="251"/>
         <source>VPN by Amnezia</source>